US9072554B2 - Orthopedic implant - Google Patents
Orthopedic implant Download PDFInfo
- Publication number
- US9072554B2 US9072554B2 US12/274,039 US27403908A US9072554B2 US 9072554 B2 US9072554 B2 US 9072554B2 US 27403908 A US27403908 A US 27403908A US 9072554 B2 US9072554 B2 US 9072554B2
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- United States
- Prior art keywords
- bone screw
- bone
- fastener
- receiving opening
- external thread
- Prior art date
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- Expired - Fee Related, expires
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/80—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates
- A61B17/8052—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates immobilised relative to screws by interlocking form of the heads and plate holes, e.g. conical or threaded
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
- A61B17/7059—Cortical plates
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/80—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates
- A61B17/8033—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates having indirect contact with screw heads, or having contact with screw heads maintained with the aid of additional components, e.g. nuts, wedges or head covers
- A61B17/8047—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates having indirect contact with screw heads, or having contact with screw heads maintained with the aid of additional components, e.g. nuts, wedges or head covers wherein the additional element surrounds the screw head in the plate hole
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/80—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates
- A61B17/809—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates with bone-penetrating elements, e.g. blades or prongs
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/064—Surgical staples, i.e. penetrating the tissue
- A61B17/0642—Surgical staples, i.e. penetrating the tissue for bones, e.g. for osteosynthesis or connecting tendon to bone
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/80—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates
- A61B17/8033—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates having indirect contact with screw heads, or having contact with screw heads maintained with the aid of additional components, e.g. nuts, wedges or head covers
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/80—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates
- A61B17/8052—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates immobilised relative to screws by interlocking form of the heads and plate holes, e.g. conical or threaded
- A61B17/8057—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates immobilised relative to screws by interlocking form of the heads and plate holes, e.g. conical or threaded the interlocking form comprising a thread
Definitions
- the present invention relates to orthopedic implants using pre-attached fasteners.
- Placement of orthopedic implants often consists of fixing an implant member to bone using one or more fasteners (often comprising bone screws). Typically, this is done by holding the implant in place while retrieving fasteners from a kit and placing them one at a time through holes or slots in the implant.
- fasteners are inserted into bone first, then the implant attached to the fasteners.
- the illustrative embodiments of this disclosure relate to instruments and methods for installation of orthopedic implant devices in general and, more specifically, to devices used in the correction, arresting or slowing of abnormal curvature of the spine, including scoliosis, hyperlordosis and hypokyphosis.
- an orthopedic implant device in an illustrative embodiment of the present disclosure, includes a body having a first surface, a second surface opposed to the first surface and configured to face a bone, and a fastener receiving opening extending between the first and second surfaces.
- a bone screw is received within the fastener receiving opening of the body and is configured to be inserted into the bone.
- the bone screw extends between proximal and distal ends and includes a threaded portion.
- a releasable securing member is configured to pre-attach the bone screw to the body prior to placement of the bone screw within the bone in a secured mode of operation by resisting axial movement of the bone screw relative to the fastener receiving opening of the body.
- an orthopedic implant device includes a spinal staple having a bridge member with an upper surface, an opposed lower surface, a first end, an opposed second end, a first leg proximate the first end and configured to be inserted into a first vertebra, and a second leg proximate the second end and configured to be inserted into a second vertebra.
- At least one fastener is configured to couple the spinal staple to at least one of the first vertebra and the second vertebra.
- a releasable securing member is configured to pre-attach the at least one fastener to the spinal staple prior to coupling of the spinal staple to the first vertebra and the second vertebra.
- a pre-assembled implant device includes an orthopedic implant, and a bone screw pre-attached to the implant prior to placement within a bone.
- a method of inserting an orthopedic implant device includes the steps of providing an implant body including a receiving opening, inserting a bone screw into the receiving opening of the implant body, and securing the bone screw to the implant body to resist axial movement of the bone screw relative to the receiving opening.
- the method further includes the steps of applying a predetermined force to the bone screw in order to release the bone screw for axial movement relative to the implant, and inserting the bone screw into bone.
- FIG. 1 is an isometric view of an orthopedic implant device including pre-attached fasteners
- FIG. 2 is a side elevation view of the implant body and fasteners of FIG. 1 ;
- FIG. 3 is a cross-sectional view of the implant body taken along line 3 - 3 of FIG. 2 , showing the fastener in a secured mode;
- FIG. 4 is a detailed view of FIG. 3 ;
- FIG. 5 is a cross-sectional view similar to FIG. 3 , showing the fastener in a released mode
- FIG. 6 is a detailed view of FIG. 5 ;
- FIG. 7 is a side elevation view of an illustrative bone screw of FIG. 1 ;
- FIG. 8 is an isometric view of a further illustrative orthopedic implant device including pre-attached fasteners
- FIG. 9 is a partially exploded isometric view of a further illustrative orthopedic implant device including pre-attached fasteners;
- FIG. 10 is a cross-sectional view taken along line 10 - 10 of FIG. 9 with the bone screw in a secured mode;
- FIG. 11 is a cross-sectional view similar to FIG. 10 showing the bone screw in a locked (down) position;
- FIG. 12 is a partial isometric view of a further illustrative orthopedic implant device for use with pre-attached fasteners
- FIG. 13 is a cross-sectional view taken along line 13 - 13 of FIG. 12 showing the bone screw in a secured mode
- FIG. 14 is a cross-sectional view similar to FIG. 13 showing the bone screw in a locked (down) position;
- FIG. 15 is an exploded isometric view of a further illustrative orthopedic implant device including pre-attached fasteners;
- FIG. 16 is a partial side elevation view of the implant body and pre-attached fasteners of FIG. 15 ;
- FIG. 17 is an end view of the implant of FIG. 15 ;
- FIG. 18 is a cross-sectional view taken along line 18 - 18 of FIG. 17 ;
- FIG. 19 is an isometric view of the implant body and fasteners of FIG. 1 coupled to an insertion tool
- FIG. 20 is an enlarged isometric view of the end effector of the insertion tool of FIG. 19 coupled to the implant body;
- FIG. 21 is a cross-sectional view of the implant body and fasteners in a spine following placement and tightening of the fasteners.
- the illustrative embodiment implant device allows the fasteners (illustratively bone screws) to be pre-assembled in the implant body to eliminate the added steps of placing the fasteners as a part of the surgical procedure.
- the screws may also be utilized to hold or attach the implant body to the insertion instrument and to allow for easy disengagement (or detachment) following placement.
- Pre-assembly is enhanced by the inclusion of at least one feature to prevent the fastener from moving out of position.
- This feature may hold the fastener in a specific position or within a position range.
- Possible features illustratively include mating threads providing an interference fit, retaining clips, spring clips or resistive materials, such as adhesives. These features may be a part of the fastener, implant body, insertion instrument, or combinations thereof.
- an interference thread on the fastener creates frictional resistance with the mating thread of the implant body, preventing axial movement during initial placement of the implant, but allowing the screw to be advanced into bone thereafter.
- This interference thread may include a screw thread which is oversized for a single revolution relative to the internal thread of the implant body.
- the fasteners are configured to pierce cortical bone. This may be accomplished with a self drilling fastener or with a fastener which acts as an awl during positioning of the implant body.
- the tips of the pre-attached screws extend from the implant body far enough to act as an awl and pierce the cortical bone during positioning of the implant device.
- this screw portion extending beyond the implant body illustratively contains a segment that is unthreaded and has a smaller diameter than the minor diameter of the screw to facilitate bone penetration.
- the tip has an acute angle and may be either sharp or dull.
- FIG. 1 is an isometric view of an illustrative embodiment pre-assembled orthopedic implant device 10 including a body 12 , illustratively a spinal staple, and pre-attached fasteners 14 and 16 , illustratively bone screws, prior to insertion into a patient. While the illustrative implant device 10 is a spinal correction implant, the implant device 10 could be a cervical plate or any orthopedic implant that requires the use or placement of fasteners 14 and 16 . In one illustrative embodiment, the implant device 10 includes a bridge member 17 connecting a pair of spaced apart legs 18 and 20 . The staple legs 18 and 20 are configured to be driven through cortical bone to provide additional bone fixation.
- the body 12 is illustratively formed of a biocompatible material, such as titanium or a titanium alloy. Although reference may be made throughout this description to terms implying direction, such as left, right, front, back, upper and lower, unless otherwise noted, these terms are used for convenience and should not be read as limiting the implant device 10 to any particular orientation.
- the bridge member 17 couples the left fastener retaining portion 22 to the right fastener retaining portion 24 .
- the lower surface 26 of the bridge member 17 is illustratively concave in a direction from a left end to a right end, and from a front side to a back side.
- arcuate protrusions define centering portions 28 extending laterally outwardly from the bridge member 17 and are configured to cooperate with an insertion tool.
- Left and right legs 18 and 20 extend downwardly from the lower surface 26 of the left and right ends of the bridge member 17 .
- Barbs 30 illustratively project outwardly from the legs 18 and 20 toward a center of the bridge member 17 .
- Anti-rotation or stabilization members or plates 32 and 34 may illustratively be located outboard of, and perpendicular to, each leg 18 and 20 . More particularly, a left anti-rotation member 32 extends between the left fastening retaining portion 22 of the left leg 18 , and a right anti-rotation member 34 extends between the right fastener retaining portion 24 and the right leg 20 .
- the anti-rotation member members 32 and 34 are configured to reduce relative motion between adjacent vertebrae 40 , while also preventing relative rotation of the fastener retaining portions 22 and 24 .
- a plurality of spinal implant devices 10 may be inserted into the vertebrae 40 of a person having an immature or growing spine 42 exhibiting scoliosis or other spinal deformity.
- the legs 18 and 20 are configured such that the implant device 10 will bridge longitudinally or lengthwise aligned, adjoining vertebrae 40 a and 40 b having confronting endplate growth centers 44 a and 44 b , and an intervening disc 46 therebetween ( FIG. 21 ).
- the implant devices 10 are illustratively driven into the bone 48 of adjoining vertebrae 40 a and 40 b on the convex side of the curved spine 42 .
- Bone screws 14 and 16 are illustratively inserted into the vertebrae 40 a and 40 b to further secure the fastener retaining portions 22 and 24 to the spine 42 .
- the bone screws 14 and 16 are illustratively formed of a biocompatible material such as titanium or a titanium alloy. Additional features of the spinal implant device 10 are further detailed in U.S. patent application Ser. No. 11/126,782, filed May 11, 2005, the disclosure of which is expressly incorporated by reference herein.
- FIG. 2 is a side view of the illustrative embodiment pre-assembled implant device 10 including a body or staple 12 and pre-attached screws 14 and 16 .
- the screws 14 and 16 are pre-assembled or pre-attached to the staple 12 , illustratively through a releasable securing member 50 that prevents the screws 14 and 16 from moving relative to the staple 12 .
- the screws 14 and 16 may be pre-attached or coupled to the staple 12 via a variety of means, including, but not limited to, mating threads (external screw threads and internal staple threads), retaining clips, spring clips, or resistive material, such as adhesives.
- Each embodiment of releasable securing member 50 is illustratively configured to pre-attach the respective bone screw 14 , 16 to the staple 12 prior to placement of the bone screw 14 , 16 in bone 48 in a secured mode of operation by resisting axial movement of the bone screw 14 , 16 relative to the fastener receiving opening 23 , 25 of the staple 12 . More particularly, the releasable securing member 50 is illustratively configured to resist rotational movement and resulting axial movement of the bone screw 14 , 16 in the secured mode of operation, and to permit rotational movement and resulting axial movement of the bone screw 14 , 16 within the receiving opening 23 , 25 in a released mode of operation.
- an illustrative bone screw 14 includes an elongated shank 51 extending between proximal and distal ends 52 and 54 . While bone screw 14 is further detailed below, it should be noted that bone screw 16 is substantially identical and, as such, the description applies equally to both bone screws 14 and 16 .
- a head 56 is supported at the proximal end 52 and a bone engaging tip 58 is supported at the distal end 54 .
- the head 56 may include a spherical surface 60 from which extend one or more protrusions 62 .
- Each protrusion 62 is configured to engage with a recess 64 formed within the fastener receiving opening 23 of the implant device 10 to facilitate locking therebetween when the bone screw 14 has engaged the bone 48 and is in a lowered position within the staple 12 . More particularly, cooperation between the protrusions 62 and recesses 64 prevent the bone screw 14 from reversing direction, thereby assuring that the bone screw 14 does not back out during normal motion of the spine 42 and other anatomical features after the bone screw 14 has been firmly secured within the bone 48 . Additional details regarding this integral fastener retention mechanism is provided in U.S. patent application Ser. No. 11/227,820, filed Sep. 15, 2005, the disclosure of which is incorporated by reference herein.
- a threaded portion 66 including a plurality of external threads 68 is supported by the shank 51 of each bone screw 14 , 16 intermediate the respective proximal and distal ends 52 and 54 .
- the external threads 68 are configured to cooperate with internal threads 69 formed within the receiving openings 23 , 25 .
- the tip 58 of each bone screw 14 , 16 illustratively extends beyond the lower surface 70 of the respective retaining portion 22 , 24 .
- the releasable securing member 50 comprises an interference between at least one of the external screw threads 68 and at least one of the internal staple threads 69 .
- Each bone screw 14 , 16 may include such an interference by a single revolution of the external screw thread 68 a being oversized relative to the internal staple thread 69 a , thereby preventing axial movement of the screw 14 , 16 relative to the staple 12 during initial placement within the patient, but allowing the respective screw 14 , 16 to be rotationally moved and advanced thereafter.
- At least one thread 68 a of the bone screw 14 , 16 interferes with at least one thread 69 a of the bone receiving opening 23 , 25 .
- the at least one external thread 68 a of the bone screw 14 , 16 has a major diameter (D) of about 4.2 mm, while the remaining threads 68 b of the bone screw 14 , 16 have a major diameter (d) of about 4.0 mm.
- the internal threads 69 of the corresponding fastener receiving opening 23 , 25 have a major diameter of about 4.0 mm to threadably engage the external threads 68 b of the bone screw 14 , 16 .
- the oversized thread 68 a of the bone screw 14 , 16 interferes with the internal threads 69 of the receiving opening 23 , 25 , radially by about 0.1 mm (i.e., interference diameter of about 0.2 mm).
- the bone screw 14 , 16 has a pitch of approximately 1.75 mm and a minor diameter of approximately 3 mm.
- the oversized external thread 68 a is plastically or elastically deformed as it passes through the internal thread 68 a without permanently damaging the threads 68 and 69 .
- the screw 14 , 16 may be successively reversed and removed without causing damage to the threads 68 and 69 .
- the coupling may be released by exerting a force on the bone screw 14 , 16 . More particularly, a torque of a predetermined amount will release the coupling and cause the bone screw 14 , 16 to enter a released mode of operation ( FIGS. 5 and 6 ). In one illustrative embodiment, the predetermined amount of torque is approximately 0.2 Newton-meters.
- the secured mode of operation of FIGS. 3 and 4 axial movement of the bone screw 14 , 16 is resisted by preventing rotation of the bone screw 14 , 16 within the receiving opening 23 , 25 .
- the threads 68 and 69 are permitted to rotate relative to one another such that axial movement of the bone screw 14 , 16 is permitted.
- Tips 58 of the pre-attached screws 14 , 16 illustratively protrude a distance 72 beyond the lower surface 70 of the staple 12 towards the target bone 48 .
- a cylindrical portion 74 of the protruding distance 72 is a smaller diameter than the minor diameter of the screw threads 68 .
- the screw tips 58 and cylindrical portions 74 and act as awls for piercing cortical bone 48 .
- the preassembled implant device 10 may be mechanically driven into bone.
- the screws 14 , 16 can be tightened to secure the staple 12 to the underlying bone 48 .
- Drill features 76 illustratively cutting edges, assist in clearing bone as the screws 14 , 16 are advanced. By piecing the cortical bone 48 prior to tightening the screws 14 , 16 , the threads 68 have a greater chance of finding purchase in the underlying bone 48 and not jacking the staple 12 back out of the bone 48 .
- FIG. 8 shows a further illustrative embodiment implant device 10 ′ wherein the resilient releasable securing member 50 comprises a resistive material 80 , positioned intermediate the body 12 and the respective bone screw 14 , 16 .
- the resistive material 80 is configured to couple the bone screw 14 , 16 to the body and more particularly the male and female threads 68 and 69 of the bone screw 14 , 16 and the receiving opening 23 , 25 in order to resist rotational and subsequent axial movement of the bone screw 14 , 16 relative to the receiving opening 23 , 25 .
- the resistive material 80 may comprise a resilient material, such as an elastomeric ring.
- the resistive material 80 may comprise a wax, an adhesive, or a viscous fluid positioned intermediate the threads 68 and 69 to prevent rotational movement therebetween.
- the releasable securing member 50 comprises a retaining clip or washer 82 . More particularly, the retaining clip 82 is received within each receiving opening 23 , 25 and frictionally secured in position relative to the body 12 .
- the retaining clip 82 includes an annular member 84 concentrically received within the fastener receiving opening 23 , 25 and including a plurality of radially inwardly extending tabs 86 .
- the tabs 86 are configured to resist movement of the external threads 68 of the bone screw 14 , 16 relative to the internal threads 69 of the receiving opening 23 , 25 in the secured mode of operation ( FIG. 10 ).
- the tabs 86 interfere with and push upward on at least one screw thread 68 so that the screw 14 , 16 is held in tension between the internal threads 69 and the tabs 86 .
- This tension force prevents movement of the screw 14 , 16 due to shock or vibration that could occur during handling and placement of the implant device 10 ′′.
- the tabs 86 are deformed downwardly and as such no longer interfere with rotational movement of the bone screw 14 , 16 relative to the internal threads 69 of the receiving opening 23 , 25 .
- the tabs 86 are deformed downward to fit between the screw 14 , 16 and the clip 82 .
- the bone screw 14 , 16 may be rotated relative to the body 12 in order to insert the bone screw 14 , 16 into bone 48 until the screw head 56 is locked in a down position with receiving portion 22 ( FIG. 11 ).
- the releasable securing member 50 may comprise one or more deformable tabs 88 secured to the body 12 and extending radially inwardly into the receiving openings 23 and 25 .
- each tab 88 interferes with an external thread 68 and is deformable by rotating the respective bone screw 14 , 16 from a secured mode of operation ( FIG. 13 ) to a released mode of operation.
- FIG. 14 shows tab 88 deformed by rotation of screw 14 to a locked (down) position.
- the tabs 88 may be separate components or may be formed integral with the implant body 12 .
- the releasable securing member 50 may comprise a deformable pin 90 inserted within an aperture 92 extending into a respective one of the receiving openings 23 , 25 .
- the pin 90 interferes with the screw threads 68 and holds the screw 14 , 16 in place.
- the pin 90 may be formed of a polymer, such as a thermoplastic.
- the pin 90 is illustratively deformed and moved out of the way by the screw 14 , 16 when driven in rotation by applying a predetermined torque.
- FIG. 19 shows the implant device 10 held by insertion tool 100 to create a loaded insertion tool 102 .
- Grabbing and releasing device 105 is controlled by the handle 104 .
- FIG. 20 shows the distal portion of loaded insertion tool 100 .
- the distal portion shows the shaft 106 and jaws 108 of insertion tool 100 .
- the jaws 108 hold the staple 12 which in turn holds the screws 14 , 16 .
- Staple legs 18 , 20 and screw tips 58 are exposed distally.
- FIG. 21 shows the position of the screws 14 , 16 after tightening in the bone 48 of vertebra 40 with the staple 12 bridging the disc 46 . Screws 14 , 16 have been advanced into the bone 48 of vertebra 40 to secure the staple 12 .
- cortical bone 48 can be pierced by the screws 14 , 16 during staple placement.
- the illustrative embodiment reduces the number of procedural steps by pre-assembling the implant and fasteners prior to placement.
- the illustrative embodiment may also eliminate the need for a separate awl and the steps required to use it into a simpler method for placing the staple. It furthermore eliminates the potential for dropping fasters and the time required to place each screw.
- the method reduces the number of steps required for surgery therefore minimizing the total surgical procedure time. Reduced time under anesthesia reduces patient risk and operating room costs.
- An illustrative method may include the steps of planning and pre-cutting the bone with an osteotome including a needle to establish a datum hole as disclosed in PCT International Application No. PCT/US06/036884, filed Sep. 21, 2006, the disclosure of which is expressly incorporated by reference herein.
- the method further illustratively includes the following steps:
Abstract
Description
-
- 1. Providing an
implant body 12 includingfastener receiving openings - 2. Inserting
fasteners implant body 12. - 3. Securing the
fasteners implant body 12 to resist axial movement of thefasteners opening 23. - 4. Using the blunt wire or pin as a datum for locating and placing the implant body 12 (optional).
- 5. Inserting the
implant body 12 in thebone 48 via theinsertion tool 100 using mechanical energy (impact force, ultrasonic or sonic energy, reciprocating motion, or other) and simultaneously inserting thefasteners - 6. Disengaging the
insertion tool 100 to release theimplant body 12 andfasteners - 7. Applying a predetermined force to the
fasteners fasteners implant body 12. - 8. Inserting the
fasteners bone 48. - 9. Tightening the
individual fasteners
- 1. Providing an
Claims (10)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US12/274,039 US9072554B2 (en) | 2005-09-21 | 2008-11-19 | Orthopedic implant |
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US71907605P | 2005-09-21 | 2005-09-21 | |
PCT/US2006/036884 WO2007035892A1 (en) | 2005-09-21 | 2006-09-21 | Endoscopic instruments and method for the delivery of spinal implant |
US369707P | 2007-11-19 | 2007-11-19 | |
US99246308A | 2008-03-21 | 2008-03-21 | |
US12/274,039 US9072554B2 (en) | 2005-09-21 | 2008-11-19 | Orthopedic implant |
Related Parent Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2006/036884 Continuation-In-Part WO2007035892A1 (en) | 2005-09-21 | 2006-09-21 | Endoscopic instruments and method for the delivery of spinal implant |
US11/992,463 Continuation-In-Part US20100100138A1 (en) | 2005-09-21 | 2006-09-21 | Endoscopic Insturments and Mehod for Delivery of Spinal Implant |
Publications (2)
Publication Number | Publication Date |
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US20090287249A1 US20090287249A1 (en) | 2009-11-19 |
US9072554B2 true US9072554B2 (en) | 2015-07-07 |
Family
ID=41316875
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US12/274,039 Expired - Fee Related US9072554B2 (en) | 2005-09-21 | 2008-11-19 | Orthopedic implant |
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US (1) | US9072554B2 (en) |
Cited By (12)
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US20180310970A1 (en) * | 2017-04-26 | 2018-11-01 | Additive Innovations, Llc | Spinal Implant with Screw Retention and Removal Mechanisms |
US10271839B2 (en) * | 2011-07-18 | 2019-04-30 | Woodwelding Ag | Method and implant for stabilizing separated bone portions relative to each other |
US10299842B2 (en) | 2013-12-20 | 2019-05-28 | Crossroads Extremity Systems, Llc | Bone plates with dynamic elements |
US10492841B2 (en) | 2014-07-10 | 2019-12-03 | Crossroads Extremity Systems, Llc | Bone implant and means of insertion |
US10945725B2 (en) | 2017-02-06 | 2021-03-16 | Crossroads Extremity Systems, Llc | Implant inserter |
US11033399B2 (en) | 2016-02-28 | 2021-06-15 | Integrated Shoulder Collaboration, Inc. | Shoulder arthroplasty implant system |
US11179149B2 (en) | 2017-02-07 | 2021-11-23 | Crossroads Extremity Systems, Llc | Counter-torque implant |
US11202626B2 (en) | 2014-07-10 | 2021-12-21 | Crossroads Extremity Systems, Llc | Bone implant with means for multi directional force and means of insertion |
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